I estimate my date of testing based on previous cycles. I am taking prometium to extend my LP, so my cycle went from 24 days to 25 last month. So it is hard to say exactly, but I plan for a 24 day cycle. Personally, I do not want to test too early and then have a chemical pregnancy. I would rather not know at that point and just get my AF. However, I cannot wait too long because I would go crazy. So I decided to test 14dpo. I have never had a lp that lasted 14 days, so if I made it to 14 dpo without AF, then either the prometrium is making my cycle long or there is a good chance I am pregnant. So I guess this is my long-winded way of saying, I plan on testing at 14dpo if I do not get AF first! lol